use crate::endian::{Endian, Parse, ToBytes};
-use crate::Error;
+use crate::{CategoryLabels, Compression};
+use encoding_rs::mem::decode_latin1;
use flate2::read::ZlibDecoder;
use num::Integer;
+use std::borrow::Cow;
+use std::fmt::{Debug, Formatter, Result as FmtResult};
use std::str::from_utf8;
use std::{
collections::VecDeque,
io::{Error as IoError, Read, Seek, SeekFrom},
iter::FusedIterator,
};
+use thiserror::Error as ThisError;
use self::state::State;
-#[derive(Copy, Clone, Debug)]
-pub enum Compression {
- Simple,
- ZLib,
+#[derive(ThisError, Debug)]
+pub enum Error {
+ #[error("Not an SPSS system file")]
+ NotASystemFile,
+
+ #[error("Invalid magic number {0:?}")]
+ BadMagic([u8; 4]),
+
+ #[error("I/O error ({0})")]
+ Io(#[from] IoError),
+
+ #[error("Invalid SAV compression code {0}")]
+ InvalidSavCompression(u32),
+
+ #[error("Invalid ZSAV compression code {0}")]
+ InvalidZsavCompression(u32),
+
+ #[error("Variable record at offset {offset:#x} specifies width {width} not in valid range [-1,255).")]
+ BadVariableWidth { offset: u64, width: i32 },
+
+ #[error("Document record at offset {offset:#x} has document line count ({n}) greater than the maximum number {max}.")]
+ BadDocumentLength { offset: u64, n: usize, max: usize },
+
+ #[error("At offset {offset:#x}, unrecognized record type {rec_type}.")]
+ BadRecordType { offset: u64, rec_type: u32 },
+
+ #[error("At offset {offset:#x}, variable label code ({code}) is not 0 or 1.")]
+ BadVariableLabelCode { offset: u64, code: u32 },
+
+ #[error(
+ "At offset {offset:#x}, numeric missing value code ({code}) is not -3, -2, 0, 1, 2, or 3."
+ )]
+ BadNumericMissingValueCode { offset: u64, code: i32 },
+
+ #[error("At offset {offset:#x}, string missing value code ({code}) is not 0, 1, 2, or 3.")]
+ BadStringMissingValueCode { offset: u64, code: i32 },
+
+ #[error("At offset {offset:#x}, number of value labels ({n}) is greater than the maximum number {max}.")]
+ BadNumberOfValueLabels { offset: u64, n: u32, max: u32 },
+
+ #[error("At offset {offset:#x}, number of variables indexes ({n}) is greater than the maximum number ({max}).")]
+ BadNumberOfVarIndexes { offset: u64, n: u32, max: u32 },
+
+ #[error("At offset {offset:#x}, record type 7 subtype {subtype} is too large with element size {size} and {count} elements.")]
+ ExtensionRecordTooLarge {
+ offset: u64,
+ subtype: u32,
+ size: u32,
+ count: u32,
+ },
+
+ #[error("Unexpected end of file at offset {offset:#x}, {case_ofs} bytes into a {case_len}-byte case.")]
+ EofInCase {
+ offset: u64,
+ case_ofs: u64,
+ case_len: usize,
+ },
+
+ #[error(
+ "Unexpected end of file at offset {offset:#x}, {case_ofs} bytes into a compressed case."
+ )]
+ EofInCompressedCase { offset: u64, case_ofs: u64 },
+
+ #[error("Data ends at offset {offset:#x}, {case_ofs} bytes into a compressed case.")]
+ PartialCompressedCase { offset: u64, case_ofs: u64 },
+
+ #[error("At {case_ofs} bytes into compressed case starting at offset {offset:#x}, a string was found where a number was expected.")]
+ CompressedNumberExpected { offset: u64, case_ofs: u64 },
+
+ #[error("At {case_ofs} bytes into compressed case starting at offset {offset:#x}, a number was found where a string was expected.")]
+ CompressedStringExpected { offset: u64, case_ofs: u64 },
+
+ #[error("Block count {n_blocks} in ZLIB trailer at offset {offset:#x} differs from expected block count {expected_n_blocks} calculated from trailer length {ztrailer_len}.")]
+ BadZlibTrailerNBlocks {
+ offset: u64,
+ n_blocks: u32,
+ expected_n_blocks: u64,
+ ztrailer_len: u64,
+ },
+
+ #[error("At offset {offset:#x}, {record} has bad size {size} bytes instead of the expected {expected_size}.")]
+ BadRecordSize {
+ offset: u64,
+ record: String,
+ size: u32,
+ expected_size: u32,
+ },
+
+ #[error("At offset {offset:#x}, {record} has bad count {count} instead of the expected {expected_count}.")]
+ BadRecordCount {
+ offset: u64,
+ record: String,
+ count: u32,
+ expected_count: u32,
+ },
+
+ #[error("In long string missing values record starting at offset {record_offset:#x}, value length at offset {offset:#x} is {value_len} instead of the expected 8.")]
+ BadLongMissingValueLength {
+ record_offset: u64,
+ offset: u64,
+ value_len: u32,
+ },
+
+ #[error("The encoding record at offset {offset:#x} contains an encoding name that is not valid UTF-8.")]
+ BadEncodingName { offset: u64 },
+
+ #[error("Details TBD")]
+ TBD,
}
+#[derive(Clone, Debug)]
pub enum Record {
- Header(Header),
- Document(Document),
- Variable(Variable),
- ValueLabel(ValueLabel),
- VarIndexes(VarIndexes),
- Extension(Extension),
+ Header(HeaderRecord),
+ Variable(VariableRecord),
+ ValueLabel(ValueLabelRecord),
+ VarIndexes(VarIndexRecord),
+ Document(DocumentRecord),
+ IntegerInfo(IntegerInfoRecord),
+ FloatInfo(FloatInfoRecord),
+ VariableSets(TextRecord),
+ VarDisplay(VarDisplayRecord),
+ MultipleResponse(MultipleResponseRecord),
+ LongStringValueLabels(LongStringValueLabelRecord),
+ Encoding(EncodingRecord),
+ NumberOfCases(NumberOfCasesRecord),
+ ProductInfo(TextRecord),
+ LongNames(TextRecord),
+ LongStrings(TextRecord),
+ FileAttributes(TextRecord),
+ VariableAttributes(TextRecord),
+ OtherExtension(Extension),
EndOfHeaders(u32),
ZHeader(ZHeader),
ZTrailer(ZTrailer),
fn read<R: Read + Seek>(reader: &mut R, endian: Endian) -> Result<Record, Error> {
let rec_type: u32 = endian.parse(read_bytes(reader)?);
match rec_type {
- 2 => Ok(Record::Variable(Variable::read(reader, endian)?)),
- 3 => Ok(Record::ValueLabel(ValueLabel::read(reader, endian)?)),
- 4 => Ok(Record::VarIndexes(VarIndexes::read(reader, endian)?)),
- 6 => Ok(Record::Document(Document::read(reader, endian)?)),
- 7 => Ok(Record::Extension(Extension::read(reader, endian)?)),
+ 2 => Ok(Record::Variable(VariableRecord::read(reader, endian)?)),
+ 3 => Ok(Record::ValueLabel(ValueLabelRecord::read(reader, endian)?)),
+ 4 => Ok(Record::VarIndexes(VarIndexRecord::read(reader, endian)?)),
+ 6 => Ok(Record::Document(DocumentRecord::read(reader, endian)?)),
+ 7 => Ok(Extension::read(reader, endian)?),
999 => Ok(Record::EndOfHeaders(endian.parse(read_bytes(reader)?))),
_ => Err(Error::BadRecordType {
offset: reader.stream_position()?,
}
}
-pub struct Header {
+// If `s` is valid UTF-8, returns it decoded as UTF-8, otherwise returns it
+// decoded as Latin-1 (actually bytes interpreted as Unicode code points).
+fn default_decode<'a>(s: &'a [u8]) -> Cow<'a, str> {
+ from_utf8(s).map_or_else(|_| decode_latin1(s), Cow::from)
+}
+
+#[derive(Clone)]
+pub struct HeaderRecord {
/// Magic number.
pub magic: Magic,
/// Eye-catcher string, product name, in the file's encoding. Padded
/// on the right with spaces.
- pub eye_catcher: [u8; 60],
+ pub eye_catcher: UnencodedStr<60>,
/// Layout code, normally either 2 or 3.
pub layout_code: u32,
/// Compression type, if any,
pub compression: Option<Compression>,
- /// 0-based variable index of the weight variable, or `None` if the file is
+ /// 1-based variable index of the weight variable, or `None` if the file is
/// unweighted.
pub weight_index: Option<u32>,
pub bias: f64,
/// `dd mmm yy` in the file's encoding.
- pub creation_date: [u8; 9],
+ pub creation_date: UnencodedStr<9>,
/// `HH:MM:SS` in the file's encoding.
- pub creation_time: [u8; 8],
+ pub creation_time: UnencodedStr<8>,
/// File label, in the file's encoding. Padded on the right with spaces.
- pub file_label: [u8; 64],
+ pub file_label: UnencodedStr<64>,
/// Endianness of the data in the file header.
pub endian: Endian,
}
-impl Header {
- fn read<R: Read>(r: &mut R) -> Result<Header, Error> {
+impl HeaderRecord {
+ fn debug_field<T: Debug>(&self, f: &mut Formatter, name: &str, value: T) -> FmtResult {
+ writeln!(f, "{name:>17}: {:?}", value)
+ }
+}
+
+impl Debug for HeaderRecord {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ writeln!(f, "File header record:")?;
+ self.debug_field(f, "Magic", self.magic)?;
+ self.debug_field(f, "Product name", &self.eye_catcher)?;
+ self.debug_field(f, "Layout code", self.layout_code)?;
+ self.debug_field(f, "Nominal case size", self.nominal_case_size)?;
+ self.debug_field(f, "Compression", self.compression)?;
+ self.debug_field(f, "Weight index", self.weight_index)?;
+ self.debug_field(f, "Number of cases", self.n_cases)?;
+ self.debug_field(f, "Compression bias", self.bias)?;
+ self.debug_field(f, "Creation date", &self.creation_date)?;
+ self.debug_field(f, "Creation time", &self.creation_time)?;
+ self.debug_field(f, "File label", &self.file_label)?;
+ self.debug_field(f, "Endianness", self.endian)
+ }
+}
+
+impl HeaderRecord {
+ fn read<R: Read>(r: &mut R) -> Result<HeaderRecord, Error> {
let magic: [u8; 4] = read_bytes(r)?;
let magic: Magic = magic.try_into().map_err(|_| Error::NotASystemFile)?;
- let eye_catcher: [u8; 60] = read_bytes(r)?;
+ let eye_catcher = UnencodedStr::<60>(read_bytes(r)?);
let layout_code: [u8; 4] = read_bytes(r)?;
let endian = Endian::identify_u32(2, layout_code)
.or_else(|| Endian::identify_u32(2, layout_code))
};
let weight_index: u32 = endian.parse(read_bytes(r)?);
- let weight_index = (weight_index > 0).then_some(weight_index - 1);
+ let weight_index = (weight_index > 0).then_some(weight_index);
let n_cases: u32 = endian.parse(read_bytes(r)?);
let n_cases = (n_cases < i32::MAX as u32 / 2).then_some(n_cases);
let bias: f64 = endian.parse(read_bytes(r)?);
- let creation_date: [u8; 9] = read_bytes(r)?;
- let creation_time: [u8; 8] = read_bytes(r)?;
- let file_label: [u8; 64] = read_bytes(r)?;
+ let creation_date = UnencodedStr::<9>(read_bytes(r)?);
+ let creation_time = UnencodedStr::<8>(read_bytes(r)?);
+ let file_label = UnencodedStr::<64>(read_bytes(r)?);
let _: [u8; 3] = read_bytes(r)?;
- Ok(Header {
+ Ok(HeaderRecord {
magic,
layout_code,
nominal_case_size,
pub const EBCDIC: Magic = Magic([0x5b, 0xc6, 0xd3, 0xf2]);
}
+impl Debug for Magic {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ let s = match self {
+ &Magic::SAV => "$FL2",
+ &Magic::ZSAV => "$FL3",
+ &Magic::EBCDIC => "($FL2 in EBCDIC)",
+ _ => return write!(f, "{:?}", self.0),
+ };
+ write!(f, "{s}")
+ }
+}
+
impl TryFrom<[u8; 4]> for Magic {
type Error = Error;
}
}
-#[derive(Copy, Clone, PartialEq, Eq, Hash)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum VarType {
- Number,
+ Numeric,
String,
}
impl VarType {
fn from_width(width: i32) -> VarType {
match width {
- 0 => VarType::Number,
+ 0 => VarType::Numeric,
_ => VarType::String,
}
}
mod state {
use super::{
- Compression, Error, Header, Record, Value, VarType, Variable, ZHeader, ZTrailer,
- ZlibDecodeMultiple,
+ Compression, Error, HeaderRecord, Record, Value, VarType, VariableRecord, ZHeader,
+ ZTrailer, ZlibDecodeMultiple,
};
use crate::endian::Endian;
use std::{
impl<R: Read + Seek + 'static> State for Start<R> {
fn read(mut self: Box<Self>) -> Result<Option<(Record, Box<dyn State>)>, Error> {
- let header = Header::read(&mut self.reader)?;
+ let header = HeaderRecord::read(&mut self.reader)?;
let next_state = Headers(CommonState {
reader: self.reader,
endian: header.endian,
fn read(mut self: Box<Self>) -> Result<Option<(Record, Box<dyn State>)>, Error> {
let record = Record::read(&mut self.0.reader, self.0.endian)?;
match record {
- Record::Variable(Variable { width, .. }) => {
+ Record::Variable(VariableRecord { width, .. }) => {
self.0.var_types.push(VarType::from_width(width));
}
Record::EndOfHeaders(_) => {
#[derive(Copy, Clone)]
pub enum Value {
Number(Option<f64>),
- String([u8; 8]),
+ String(UnencodedStr<8>),
+}
+
+impl Debug for Value {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ match self {
+ Value::Number(Some(number)) => write!(f, "{number:?}"),
+ Value::Number(None) => write!(f, "SYSMIS"),
+ Value::String(bytes) => write!(f, "{:?}", bytes),
+ }
+ }
}
impl Value {
- pub fn from_raw(var_type: VarType, raw: [u8; 8], endian: Endian) -> Value {
+ fn read<R: Read>(r: &mut R, var_type: VarType, endian: Endian) -> Result<Value, IoError> {
+ Ok(Self::from_raw(
+ UntypedValue(read_bytes(r)?),
+ var_type,
+ endian,
+ ))
+ }
+
+ pub fn from_raw(raw: UntypedValue, var_type: VarType, endian: Endian) -> Value {
match var_type {
- VarType::String => Value::String(raw),
- VarType::Number => {
- let number: f64 = endian.parse(raw);
+ VarType::String => Value::String(UnencodedStr(raw.0)),
+ VarType::Numeric => {
+ let number: f64 = endian.parse(raw.0);
Value::Number((number != -f64::MAX).then_some(number))
}
}
});
}
};
- values.push(Value::from_raw(var_type, raw, endian));
+ values.push(Value::from_raw(UntypedValue(raw), var_type, endian));
}
Ok(Some(values))
}
match code {
0 => (),
1..=251 => match var_type {
- VarType::Number => break Value::Number(Some(code as f64 - bias)),
+ VarType::Numeric => break Value::Number(Some(code as f64 - bias)),
VarType::String => {
- break Value::String(endian.to_bytes(code as f64 - bias))
+ break Value::String(UnencodedStr(endian.to_bytes(code as f64 - bias)))
}
},
252 => {
});
}
}
- 253 => break Value::from_raw(var_type, read_bytes(reader)?, endian),
+ 253 => {
+ break Value::from_raw(UntypedValue(read_bytes(reader)?), var_type, endian)
+ }
254 => match var_type {
- VarType::String => break Value::String(*b" "), // XXX EBCDIC
- VarType::Number => {
+ VarType::String => break Value::String(UnencodedStr(*b" ")), // XXX EBCDIC
+ VarType::Numeric => {
return Err(Error::CompressedStringExpected {
offset: case_start,
case_ofs: reader.stream_position()? - case_start,
}
},
255 => match var_type {
- VarType::Number => break Value::Number(None),
+ VarType::Numeric => break Value::Number(None),
VarType::String => {
return Err(Error::CompressedNumberExpected {
offset: case_start,
state: Some(state::new(reader)),
})
}
+ pub fn collect_headers(&mut self) -> Result<Vec<Record>, Error> {
+ let mut headers = Vec::new();
+ for record in self {
+ match record? {
+ Record::EndOfHeaders(_) => break,
+ r => headers.push(r),
+ };
+ }
+ Ok(headers)
+ }
}
impl Iterator for Reader {
impl FusedIterator for Reader {}
-pub struct Variable {
+#[derive(Copy, Clone, PartialEq, Eq, Hash)]
+pub struct Spec(pub u32);
+
+impl Debug for Spec {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ let type_ = format_name(self.0 >> 16);
+ let w = (self.0 >> 8) & 0xff;
+ let d = self.0 & 0xff;
+ write!(f, "{:06x} ({type_}{w}.{d})", self.0)
+ }
+}
+
+fn format_name(type_: u32) -> Cow<'static, str> {
+ match type_ {
+ 1 => "A",
+ 2 => "AHEX",
+ 3 => "COMMA",
+ 4 => "DOLLAR",
+ 5 => "F",
+ 6 => "IB",
+ 7 => "PIBHEX",
+ 8 => "P",
+ 9 => "PIB",
+ 10 => "PK",
+ 11 => "RB",
+ 12 => "RBHEX",
+ 15 => "Z",
+ 16 => "N",
+ 17 => "E",
+ 20 => "DATE",
+ 21 => "TIME",
+ 22 => "DATETIME",
+ 23 => "ADATE",
+ 24 => "JDATE",
+ 25 => "DTIME",
+ 26 => "WKDAY",
+ 27 => "MONTH",
+ 28 => "MOYR",
+ 29 => "QYR",
+ 30 => "WKYR",
+ 31 => "PCT",
+ 32 => "DOT",
+ 33 => "CCA",
+ 34 => "CCB",
+ 35 => "CCC",
+ 36 => "CCD",
+ 37 => "CCE",
+ 38 => "EDATE",
+ 39 => "SDATE",
+ 40 => "MTIME",
+ 41 => "YMDHMS",
+ _ => return format!("<unknown format {type_}>").into(),
+ }
+ .into()
+}
+
+#[derive(Clone)]
+pub struct MissingValues {
+ /// Individual missing values, up to 3 of them.
+ pub values: Vec<Value>,
+
+ /// Optional range of missing values.
+ pub range: Option<(Value, Value)>,
+}
+
+impl Debug for MissingValues {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ for (i, value) in self.values.iter().enumerate() {
+ if i > 0 {
+ write!(f, ", ")?;
+ }
+ write!(f, "{value:?}")?;
+ }
+
+ if let Some((low, high)) = self.range {
+ if !self.values.is_empty() {
+ write!(f, ", ")?;
+ }
+ write!(f, "{low:?} THRU {high:?}")?;
+ }
+
+ if self.is_empty() {
+ write!(f, "none")?;
+ }
+
+ Ok(())
+ }
+}
+
+impl MissingValues {
+ fn is_empty(&self) -> bool {
+ self.values.is_empty() && self.range.is_none()
+ }
+
+ fn read<R: Read + Seek>(
+ r: &mut R,
+ offset: u64,
+ width: i32,
+ code: i32,
+ endian: Endian,
+ ) -> Result<MissingValues, Error> {
+ let (n_values, has_range) = match (width, code) {
+ (_, 0..=3) => (code, false),
+ (0, -2) => (0, true),
+ (0, -3) => (1, true),
+ (0, _) => return Err(Error::BadNumericMissingValueCode { offset, code }),
+ (_, _) => return Err(Error::BadStringMissingValueCode { offset, code }),
+ };
+
+ let var_type = VarType::from_width(width);
+
+ let mut values = Vec::new();
+ for _ in 0..n_values {
+ values.push(Value::read(r, var_type, endian)?);
+ }
+ let range = if has_range {
+ let low = Value::read(r, var_type, endian)?;
+ let high = Value::read(r, var_type, endian)?;
+ Some((low, high))
+ } else {
+ None
+ };
+ Ok(MissingValues { values, range })
+ }
+}
+
+#[derive(Clone)]
+pub struct VariableRecord {
/// Offset from the start of the file to the start of the record.
pub offset: u64,
pub width: i32,
/// Variable name, padded on the right with spaces.
- pub name: [u8; 8],
+ pub name: UnencodedStr<8>,
/// Print format.
- pub print_format: u32,
+ pub print_format: Spec,
/// Write format.
- pub write_format: u32,
-
- /// Missing value code, one of -3, -2, 0, 1, 2, or 3.
- pub missing_value_code: i32,
+ pub write_format: Spec,
- /// Raw missing values, up to 3 of them.
- pub missing: Vec<[u8; 8]>,
+ /// Missing values.
+ pub missing_values: MissingValues,
/// Optional variable label.
- pub label: Option<Vec<u8>>,
+ pub label: Option<UnencodedString>,
+}
+
+impl Debug for VariableRecord {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ writeln!(
+ f,
+ "Width: {} ({})",
+ self.width,
+ if self.width > 0 {
+ "string"
+ } else if self.width == 0 {
+ "numeric"
+ } else {
+ "long string continuation record"
+ }
+ )?;
+ writeln!(f, "Print format: {:?}", self.print_format)?;
+ writeln!(f, "Write format: {:?}", self.write_format)?;
+ writeln!(f, "Name: {:?}", &self.name)?;
+ writeln!(f, "Variable label: {:?}", self.label)?;
+ writeln!(f, "Missing values: {:?}", self.missing_values)
+ }
}
-impl Variable {
- fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<Variable, Error> {
+impl VariableRecord {
+ fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<VariableRecord, Error> {
let offset = r.stream_position()?;
let width: i32 = endian.parse(read_bytes(r)?);
let has_variable_label: u32 = endian.parse(read_bytes(r)?);
let missing_value_code: i32 = endian.parse(read_bytes(r)?);
- let print_format: u32 = endian.parse(read_bytes(r)?);
- let write_format: u32 = endian.parse(read_bytes(r)?);
- let name: [u8; 8] = read_bytes(r)?;
+ let print_format = Spec(endian.parse(read_bytes(r)?));
+ let write_format = Spec(endian.parse(read_bytes(r)?));
+ let name = UnencodedStr::<8>(read_bytes(r)?);
let label = match has_variable_label {
0 => None,
1 => {
let len: u32 = endian.parse(read_bytes(r)?);
let read_len = len.min(65535) as usize;
- let label = Some(read_vec(r, read_len)?);
+ let label = UnencodedString(read_vec(r, read_len)?);
let padding_bytes = Integer::next_multiple_of(&len, &4) - len;
let _ = read_vec(r, padding_bytes as usize)?;
- label
+ Some(label)
}
_ => {
return Err(Error::BadVariableLabelCode {
}
};
- let mut missing = Vec::new();
- if missing_value_code != 0 {
- match (width, missing_value_code) {
- (0, -3 | -2 | 1 | 2 | 3) => (),
- (0, _) => {
- return Err(Error::BadNumericMissingValueCode {
- offset,
- code: missing_value_code,
- })
- }
- (_, 0..=3) => (),
- (_, _) => {
- return Err(Error::BadStringMissingValueCode {
- offset,
- code: missing_value_code,
- })
- }
- }
-
- for _ in 0..missing_value_code.abs() {
- missing.push(read_bytes(r)?);
- }
- }
+ let missing_values = MissingValues::read(r, offset, width, missing_value_code, endian)?;
- Ok(Variable {
+ Ok(VariableRecord {
offset,
width,
name,
print_format,
write_format,
- missing_value_code,
- missing,
+ missing_values,
label,
})
}
}
-pub struct ValueLabel {
+#[derive(Copy, Clone)]
+pub struct UntypedValue(pub [u8; 8]);
+
+impl Debug for UntypedValue {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ let little: f64 = Endian::Little.parse(self.0);
+ let little = format!("{:?}", little);
+ let big: f64 = Endian::Big.parse(self.0);
+ let big = format!("{:?}", big);
+ let number = if little.len() <= big.len() {
+ little
+ } else {
+ big
+ };
+ write!(f, "{number}")?;
+
+ let string = default_decode(&self.0);
+ let string = string
+ .split(|c: char| c == '\0' || c.is_control())
+ .next()
+ .unwrap();
+ write!(f, "{string:?}")?;
+ Ok(())
+ }
+}
+
+#[derive(Clone)]
+pub struct UnencodedString(pub Vec<u8>);
+
+impl From<Vec<u8>> for UnencodedString {
+ fn from(source: Vec<u8>) -> Self {
+ Self(source)
+ }
+}
+
+impl From<&[u8]> for UnencodedString {
+ fn from(source: &[u8]) -> Self {
+ Self(source.into())
+ }
+}
+
+impl Debug for UnencodedString {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ write!(f, "{:?}", default_decode(self.0.as_slice()))
+ }
+}
+
+#[derive(Copy, Clone)]
+pub struct UnencodedStr<const N: usize>(pub [u8; N]);
+
+impl<const N: usize> From<[u8; N]> for UnencodedStr<N> {
+ fn from(source: [u8; N]) -> Self {
+ Self(source)
+ }
+}
+
+impl<const N: usize> Debug for UnencodedStr<N> {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ write!(f, "{:?}", default_decode(&self.0))
+ }
+}
+
+#[derive(Clone)]
+pub struct ValueLabelRecord {
/// Offset from the start of the file to the start of the record.
pub offset: u64,
/// The labels.
- pub labels: Vec<([u8; 8], Vec<u8>)>,
+ pub labels: Vec<(UntypedValue, UnencodedString)>,
+}
+
+impl Debug for ValueLabelRecord {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ for (value, label) in self.labels.iter() {
+ writeln!(f, "{value:?}: {label:?}")?;
+ }
+ Ok(())
+ }
}
-impl ValueLabel {
+impl ValueLabelRecord {
/// Maximum number of value labels in a record.
pub const MAX: u32 = u32::MAX / 8;
- fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<ValueLabel, Error> {
+ fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<ValueLabelRecord, Error> {
let offset = r.stream_position()?;
let n: u32 = endian.parse(read_bytes(r)?);
- if n > ValueLabel::MAX {
+ if n > ValueLabelRecord::MAX {
return Err(Error::BadNumberOfValueLabels {
offset,
n,
- max: ValueLabel::MAX,
+ max: ValueLabelRecord::MAX,
});
}
let mut labels = Vec::new();
for _ in 0..n {
- let value: [u8; 8] = read_bytes(r)?;
+ let value = UntypedValue(read_bytes(r)?);
let label_len: u8 = endian.parse(read_bytes(r)?);
let label_len = label_len as usize;
let padded_len = Integer::next_multiple_of(&(label_len + 1), &8);
- let mut label = read_vec(r, padded_len)?;
+ let mut label = read_vec(r, padded_len - 1)?;
label.truncate(label_len);
- labels.push((value, label));
+ labels.push((value, UnencodedString(label)));
}
- Ok(ValueLabel { offset, labels })
+ Ok(ValueLabelRecord { offset, labels })
}
}
-pub struct VarIndexes {
+#[derive(Clone)]
+pub struct VarIndexRecord {
/// Offset from the start of the file to the start of the record.
pub offset: u64,
- /// The 0-based indexes of the variable indexes.
- pub var_indexes: Vec<u32>,
+ /// The 1-based indexes of the variable indexes.
+ pub dict_indexes: Vec<u32>,
+}
+
+impl Debug for VarIndexRecord {
+ fn fmt(&self, f: &mut Formatter) -> FmtResult {
+ write!(f, "apply to variables")?;
+ for dict_index in self.dict_indexes.iter() {
+ write!(f, " #{dict_index}")?;
+ }
+ Ok(())
+ }
}
-impl VarIndexes {
+impl VarIndexRecord {
/// Maximum number of variable indexes in a record.
pub const MAX: u32 = u32::MAX / 8;
- fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<VarIndexes, Error> {
+ fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<VarIndexRecord, Error> {
let offset = r.stream_position()?;
let n: u32 = endian.parse(read_bytes(r)?);
- if n > VarIndexes::MAX {
+ if n > VarIndexRecord::MAX {
return Err(Error::BadNumberOfVarIndexes {
offset,
n,
- max: VarIndexes::MAX,
+ max: VarIndexRecord::MAX,
});
}
- let mut var_indexes = Vec::with_capacity(n as usize);
+ let mut dict_indexes = Vec::with_capacity(n as usize);
for _ in 0..n {
- var_indexes.push(endian.parse(read_bytes(r)?));
+ dict_indexes.push(endian.parse(read_bytes(r)?));
}
- Ok(VarIndexes {
+ Ok(VarIndexRecord {
offset,
- var_indexes,
+ dict_indexes,
})
}
}
-pub struct Document {
+#[derive(Clone, Debug)]
+pub struct DocumentRecord {
/// Offset from the start of the file to the start of the record.
pub pos: u64,
/// The document, as an array of 80-byte lines.
- pub lines: Vec<[u8; Document::LINE_LEN as usize]>,
+ pub lines: Vec<DocumentLine>,
}
-impl Document {
+pub type DocumentLine = UnencodedStr<{ DocumentRecord::LINE_LEN }>;
+
+impl DocumentRecord {
/// Length of a line in a document. Document lines are fixed-length and
/// padded on the right with spaces.
- pub const LINE_LEN: u32 = 80;
+ pub const LINE_LEN: usize = 80;
/// Maximum number of lines we will accept in a document. This is simply
/// the maximum number that will fit in a 32-bit space.
- pub const MAX_LINES: u32 = i32::MAX as u32 / Self::LINE_LEN;
+ pub const MAX_LINES: usize = i32::MAX as usize / Self::LINE_LEN;
- fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<Document, Error> {
+ fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<DocumentRecord, Error> {
let offset = r.stream_position()?;
let n: u32 = endian.parse(read_bytes(r)?);
- match n {
- 0..=Self::MAX_LINES => Ok(Document {
- pos: r.stream_position()?,
- lines: (0..n)
- .map(|_| read_bytes(r))
- .collect::<Result<Vec<_>, _>>()?,
- }),
- _ => Err(Error::BadDocumentLength {
+ let n = n as usize;
+ if n > Self::MAX_LINES {
+ Err(Error::BadDocumentLength {
offset,
n,
max: Self::MAX_LINES,
- }),
+ })
+ } else {
+ let pos = r.stream_position()?;
+ let mut lines = Vec::with_capacity(n);
+ for _ in 0..n {
+ lines.push(UnencodedStr::<{ DocumentRecord::LINE_LEN }>(read_bytes(r)?));
+ }
+ Ok(DocumentRecord { pos, lines })
}
}
}
-/*
-#[derive(FromPrimitive)]
-enum ExtensionType {
- /// Machine integer info.
- Integer = 3,
- /// Machine floating-point info.
- Float = 4,
- /// Variable sets.
- VarSets = 5,
- /// DATE.
- Date = 6,
- /// Multiple response sets.
- Mrsets = 7,
- /// SPSS Data Entry.
- DataEntry = 8,
- /// Extra product info text.
- ProductInfo = 10,
- /// Variable display parameters.
- Display = 11,
- /// Long variable names.
- LongNames = 13,
- /// Long strings.
- LongStrings = 14,
- /// Extended number of cases.
- Ncases = 16,
- /// Data file attributes.
- FileAttrs = 17,
- /// Variable attributes.
- VarAttrs = 18,
- /// Multiple response sets (extended).
- Mrsets2 = 19,
- /// Character encoding.
- Encoding = 20,
- /// Value labels for long strings.
- LongLabels = 21,
- /// Missing values for long strings.
- LongMissing = 22,
- /// "Format properties in dataview table".
- Dataview = 24,
-}
- */
-
-trait TextRecord
-where
- Self: Sized,
-{
- const NAME: &'static str;
- fn parse(input: &str, warn: impl Fn(Error)) -> Result<Self, Error>;
-}
-
trait ExtensionRecord
where
Self: Sized,
{
+ const SUBTYPE: u32;
const SIZE: Option<u32>;
const COUNT: Option<u32>;
const NAME: &'static str;
fn parse(ext: &Extension, endian: Endian, warn: impl Fn(Error)) -> Result<Self, Error>;
}
-pub struct IntegerInfo {
+#[derive(Clone, Debug)]
+pub struct IntegerInfoRecord {
pub version: (i32, i32, i32),
pub machine_code: i32,
pub floating_point_rep: i32,
pub character_code: i32,
}
-impl ExtensionRecord for IntegerInfo {
+impl ExtensionRecord for IntegerInfoRecord {
+ const SUBTYPE: u32 = 3;
const SIZE: Option<u32> = Some(4);
const COUNT: Option<u32> = Some(8);
const NAME: &'static str = "integer record";
let data: Vec<i32> = (0..8)
.map(|_| endian.parse(read_bytes(&mut input).unwrap()))
.collect();
- Ok(IntegerInfo {
+ Ok(IntegerInfoRecord {
version: (data[0], data[1], data[2]),
machine_code: data[3],
floating_point_rep: data[4],
}
}
-pub struct FloatInfo {
+#[derive(Clone, Debug)]
+pub struct FloatInfoRecord {
pub sysmis: f64,
pub highest: f64,
pub lowest: f64,
}
-impl ExtensionRecord for FloatInfo {
+impl ExtensionRecord for FloatInfoRecord {
+ const SUBTYPE: u32 = 4;
const SIZE: Option<u32> = Some(8);
const COUNT: Option<u32> = Some(3);
const NAME: &'static str = "floating point record";
let data: Vec<f64> = (0..3)
.map(|_| endian.parse(read_bytes(&mut input).unwrap()))
.collect();
- Ok(FloatInfo {
+ Ok(FloatInfoRecord {
sysmis: data[0],
highest: data[1],
lowest: data[2],
}
}
-pub enum CategoryLabels {
- VarLabels,
- CountedValues,
-}
+#[derive(Clone, Debug)]
pub enum MultipleResponseType {
MultipleDichotomy {
- value: Vec<u8>,
+ value: UnencodedString,
labels: CategoryLabels,
},
MultipleCategory,
}
+#[derive(Clone, Debug)]
pub struct MultipleResponseSet {
- pub name: Vec<u8>,
- pub label: Vec<u8>,
+ pub name: UnencodedString,
+ pub label: UnencodedString,
pub mr_type: MultipleResponseType,
- pub vars: Vec<Vec<u8>>,
+ pub vars: Vec<UnencodedString>,
}
impl MultipleResponseSet {
}
}
-pub struct MultipleResponseSets(Vec<MultipleResponseSet>);
+#[derive(Clone, Debug)]
+pub struct MultipleResponseRecord(Vec<MultipleResponseSet>);
-impl ExtensionRecord for MultipleResponseSets {
+impl ExtensionRecord for MultipleResponseRecord {
+ const SUBTYPE: u32 = 7;
const SIZE: Option<u32> = Some(1);
const COUNT: Option<u32> = None;
const NAME: &'static str = "multiple response set record";
sets.push(set);
input = rest;
}
- Ok(MultipleResponseSets(sets))
+ Ok(MultipleResponseRecord(sets))
}
}
-fn parse_counted_string(input: &[u8]) -> Result<(&[u8], &[u8]), Error> {
+fn parse_counted_string(input: &[u8]) -> Result<(UnencodedString, &[u8]), Error> {
let Some(space) = input.iter().position(|&b| b == b' ') else {
return Err(Error::TBD);
};
};
let (string, rest) = input.split_at(length);
- Ok((string, rest))
-}
-
-pub struct ExtraProductInfo(String);
-
-impl TextRecord for ExtraProductInfo {
- const NAME: &'static str = "extra product info";
- fn parse(input: &str, _warn: impl Fn(Error)) -> Result<Self, Error> {
- Ok(ExtraProductInfo(input.into()))
- }
+ Ok((string.into(), rest))
}
-pub struct VarDisplayRecord(Vec<u32>);
+#[derive(Clone, Debug)]
+pub struct VarDisplayRecord(pub Vec<u32>);
impl ExtensionRecord for VarDisplayRecord {
+ const SUBTYPE: u32 = 11;
const SIZE: Option<u32> = Some(4);
const COUNT: Option<u32> = None;
const NAME: &'static str = "variable display record";
}
}
-pub struct VariableSet {
- pub name: String,
- pub vars: Vec<String>,
-}
-
-impl VariableSet {
- fn parse(input: &str) -> Result<Self, Error> {
- let (name, input) = input.split_once('=').ok_or(Error::TBD)?;
- let vars = input.split_ascii_whitespace().map(String::from).collect();
- Ok(VariableSet {
- name: name.into(),
- vars,
- })
- }
-}
-
-pub struct VariableSetRecord(Vec<VariableSet>);
-
-impl TextRecord for VariableSetRecord {
- const NAME: &'static str = "variable set";
- fn parse(input: &str, warn: impl Fn(Error)) -> Result<Self, Error> {
- let mut sets = Vec::new();
- for line in input.lines() {
- match VariableSet::parse(line) {
- Ok(set) => sets.push(set),
- Err(error) => warn(error),
- }
- }
- Ok(VariableSetRecord(sets))
- }
-}
-
-pub struct LongVariableName {
- pub short_name: String,
- pub long_name: String,
-}
-
-pub struct LongVariableNameRecord(Vec<LongVariableName>);
-
-impl TextRecord for LongVariableNameRecord {
- const NAME: &'static str = "long variable names";
- fn parse(input: &str, warn: impl Fn(Error)) -> Result<Self, Error> {
- let mut names = Vec::new();
- for pair in input.split('\t').filter(|s| !s.is_empty()) {
- if let Some((short_name, long_name)) = pair.split_once('=') {
- let name = LongVariableName {
- short_name: short_name.into(),
- long_name: long_name.into(),
- };
- names.push(name);
- } else {
- warn(Error::TBD)
- }
- }
- Ok(LongVariableNameRecord(names))
- }
-}
-
-pub struct VeryLongString {
- pub short_name: String,
- pub length: usize,
-}
-
-impl VeryLongString {
- fn parse(input: &str) -> Result<VeryLongString, Error> {
- let Some((short_name, length)) = input.split_once('=') else {
- return Err(Error::TBD);
- };
- let length: usize = length.parse().map_err(|_| Error::TBD)?;
- Ok(VeryLongString {
- short_name: short_name.into(),
- length,
- })
- }
-}
-
-pub struct VeryLongStringRecord(Vec<VeryLongString>);
-
-impl TextRecord for VeryLongStringRecord {
- const NAME: &'static str = "very long strings";
- fn parse(input: &str, warn: impl Fn(Error)) -> Result<Self, Error> {
- let mut very_long_strings = Vec::new();
- for tuple in input
- .split('\0')
- .map(|s| s.trim_end_matches('\t'))
- .filter(|s| !s.is_empty())
- {
- match VeryLongString::parse(tuple) {
- Ok(vls) => very_long_strings.push(vls),
- Err(error) => warn(error),
- }
- }
- Ok(VeryLongStringRecord(very_long_strings))
- }
-}
-
-pub struct LongStringValueLabels {
- pub var_name: Vec<u8>,
- pub width: u32,
-
- /// `(value, label)` pairs, where each value is `width` bytes.
- pub labels: Vec<(Vec<u8>, Vec<u8>)>,
-}
-
-pub struct LongStringValueLabelSet(Vec<LongStringValueLabels>);
-
-impl ExtensionRecord for LongStringValueLabelSet {
- const SIZE: Option<u32> = Some(1);
- const COUNT: Option<u32> = None;
- const NAME: &'static str = "long string value labels record";
-
- fn parse(ext: &Extension, endian: Endian, _warn: impl Fn(Error)) -> Result<Self, Error> {
- ext.check_size::<Self>()?;
-
- let mut input = &ext.data[..];
- let mut label_set = Vec::new();
- while !input.is_empty() {
- let var_name = read_string(&mut input, endian)?;
- let width: u32 = endian.parse(read_bytes(&mut input)?);
- let n_labels: u32 = endian.parse(read_bytes(&mut input)?);
- let mut labels = Vec::new();
- for _ in 0..n_labels {
- let value = read_string(&mut input, endian)?;
- let label = read_string(&mut input, endian)?;
- labels.push((value, label));
- }
- label_set.push(LongStringValueLabels {
- var_name,
- width,
- labels,
- })
- }
- Ok(LongStringValueLabelSet(label_set))
- }
-}
-
pub struct LongStringMissingValues {
/// Variable name.
- pub var_name: Vec<u8>,
+ pub var_name: UnencodedString,
- /// Up to three missing values.
- pub missing_values: Vec<[u8; 8]>,
+ /// Missing values.
+ pub missing_values: MissingValues,
}
pub struct LongStringMissingValueSet(Vec<LongStringMissingValues>);
impl ExtensionRecord for LongStringMissingValueSet {
+ const SUBTYPE: u32 = 22;
const SIZE: Option<u32> = Some(1);
const COUNT: Option<u32> = None;
const NAME: &'static str = "long string missing values record";
value_len,
});
}
- let mut missing_values = Vec::new();
+ let mut values = Vec::new();
for i in 0..n_missing_values {
let value: [u8; 8] = read_bytes(&mut input)?;
let numeric_value: u64 = endian.parse(value);
} else {
value
};
- missing_values.push(value);
+ values.push(Value::String(UnencodedStr(value)));
}
+ let missing_values = MissingValues {
+ values,
+ range: None,
+ };
missing_value_set.push(LongStringMissingValues {
var_name,
missing_values,
}
}
-pub struct Encoding(pub String);
+#[derive(Clone, Debug)]
+pub struct EncodingRecord(pub String);
-impl ExtensionRecord for Encoding {
+impl ExtensionRecord for EncodingRecord {
+ const SUBTYPE: u32 = 20;
const SIZE: Option<u32> = Some(1);
const COUNT: Option<u32> = None;
const NAME: &'static str = "encoding record";
fn parse(ext: &Extension, _endian: Endian, _warn: impl Fn(Error)) -> Result<Self, Error> {
ext.check_size::<Self>()?;
- Ok(Encoding(String::from_utf8(ext.data.clone()).map_err(
- |_| Error::BadEncodingName { offset: ext.offset },
- )?))
- }
-}
-
-pub struct Attribute {
- pub name: String,
- pub values: Vec<String>,
-}
-
-impl Attribute {
- fn parse<'a>(input: &'a str, warn: &impl Fn(Error)) -> Result<(Attribute, &'a str), Error> {
- let Some((name, mut input)) = input.split_once('(') else {
- return Err(Error::TBD);
- };
- let mut values = Vec::new();
- loop {
- let Some((value, rest)) = input.split_once('\n') else {
- return Err(Error::TBD);
- };
- if let Some(stripped) = value
- .strip_prefix('\'')
- .and_then(|value| value.strip_suffix('\''))
- {
- values.push(stripped.into());
- } else {
- warn(Error::TBD);
- values.push(value.into());
- }
- if let Some(rest) = rest.strip_prefix(')') {
- return Ok((
- Attribute {
- name: name.into(),
- values,
- },
- rest,
- ));
- }
- input = rest;
- }
- }
-}
-
-pub struct AttributeSet(pub Vec<Attribute>);
-
-impl AttributeSet {
- fn parse<'a>(
- mut input: &'a str,
- sentinel: Option<char>,
- warn: &impl Fn(Error),
- ) -> Result<(AttributeSet, &'a str), Error> {
- let mut attributes = Vec::new();
- let rest = loop {
- match input.chars().next() {
- None => break input,
- c if c == sentinel => break &input[1..],
- _ => {
- let (attribute, rest) = Attribute::parse(input, &warn)?;
- attributes.push(attribute);
- input = rest;
- }
- }
- };
- Ok((AttributeSet(attributes), rest))
- }
-}
-
-pub struct FileAttributeRecord(AttributeSet);
-
-impl TextRecord for FileAttributeRecord {
- const NAME: &'static str = "data file attributes";
- fn parse(input: &str, warn: impl Fn(Error)) -> Result<Self, Error> {
- let (set, rest) = AttributeSet::parse(input, None, &warn)?;
- if !rest.is_empty() {
- warn(Error::TBD);
- }
- Ok(FileAttributeRecord(set))
- }
-}
-
-pub struct VarAttributeSet {
- pub long_var_name: String,
- pub attributes: AttributeSet,
-}
-
-impl VarAttributeSet {
- fn parse<'a>(
- input: &'a str,
- warn: &impl Fn(Error),
- ) -> Result<(VarAttributeSet, &'a str), Error> {
- let Some((long_var_name, rest)) = input.split_once(':') else {
- return Err(Error::TBD);
- };
- let (attributes, rest) = AttributeSet::parse(rest, Some('/'), warn)?;
- Ok((
- VarAttributeSet {
- long_var_name: long_var_name.into(),
- attributes,
- },
- rest,
+ Ok(EncodingRecord(
+ String::from_utf8(ext.data.clone())
+ .map_err(|_| Error::BadEncodingName { offset: ext.offset })?,
))
}
}
-pub struct VariableAttributeRecord(Vec<VarAttributeSet>);
-
-impl TextRecord for VariableAttributeRecord {
- const NAME: &'static str = "variable attributes";
- fn parse(mut input: &str, warn: impl Fn(Error)) -> Result<Self, Error> {
- let mut var_attribute_sets = Vec::new();
- while !input.is_empty() {
- match VarAttributeSet::parse(input, &warn) {
- Ok((var_attribute, rest)) => {
- var_attribute_sets.push(var_attribute);
- input = rest;
- }
- Err(error) => {
- warn(error);
- break;
- }
- }
- }
- Ok(VariableAttributeRecord(var_attribute_sets))
- }
-}
-
+#[derive(Clone, Debug)]
pub struct NumberOfCasesRecord {
/// Always observed as 1.
pub one: u64,
}
impl ExtensionRecord for NumberOfCasesRecord {
+ const SUBTYPE: u32 = 16;
const SIZE: Option<u32> = Some(8);
const COUNT: Option<u32> = Some(2);
const NAME: &'static str = "extended number of cases record";
}
}
+#[derive(Clone, Debug)]
+pub struct TextRecord {
+ /// Offset from the start of the file to the start of the record.
+ pub offset: u64,
+
+ /// The text content of the record.
+ pub text: UnencodedString,
+}
+
+impl From<Extension> for TextRecord {
+ fn from(source: Extension) -> Self {
+ TextRecord { offset: source.offset, text: source.data.into() }
+ }
+}
+
+#[derive(Clone, Debug)]
pub struct Extension {
/// Offset from the start of the file to the start of the record.
pub offset: u64,
pub data: Vec<u8>,
}
-/*
-fn extension_record_size_requirements(extension: ExtensionType) -> (u32, u32) {
- match extension {
- /* Implemented record types. */
- ExtensionType::Integer => (4, 8),
- ExtensionType::Float => (8, 3),
- ExtensionType::VarSets => (1, 0),
- ExtensionType::Mrsets => (1, 0),
- ExtensionType::ProductInfo => (1, 0),
- ExtensionType::Display => (4, 0),
- ExtensionType::LongNames => (1, 0),
- ExtensionType::LongStrings => (1, 0),
- ExtensionType::Ncases => (8, 2),
- ExtensionType::FileAttrs => (1, 0),
- ExtensionType::VarAttrs => (1, 0),
- ExtensionType::Mrsets2 => (1, 0),
- ExtensionType::Encoding => (1, 0),
- ExtensionType::LongLabels => (1, 0),
- ExtensionType::LongMissing => (1, 0),
-
- /* Ignored record types. */
- ExtensionType::Date => (0, 0),
- ExtensionType::DataEntry => (0, 0),
- ExtensionType::Dataview => (0, 0),
- }
-}
- */
-
impl Extension {
fn check_size<E: ExtensionRecord>(&self) -> Result<(), Error> {
if let Some(expected_size) = E::SIZE {
Ok(())
}
- fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<Extension, Error> {
+ fn read<R: Read + Seek>(r: &mut R, endian: Endian) -> Result<Record, Error> {
let subtype = endian.parse(read_bytes(r)?);
let offset = r.stream_position()?;
let size: u32 = endian.parse(read_bytes(r)?);
};
let offset = r.stream_position()?;
let data = read_vec(r, product as usize)?;
- Ok(Extension {
+ let extension = Extension {
offset,
subtype,
size,
count,
data,
- })
+ };
+ match subtype {
+ IntegerInfoRecord::SUBTYPE => Ok(Record::IntegerInfo(IntegerInfoRecord::parse(
+ &extension,
+ endian,
+ |_| (),
+ )?)),
+ FloatInfoRecord::SUBTYPE => Ok(Record::FloatInfo(FloatInfoRecord::parse(
+ &extension,
+ endian,
+ |_| (),
+ )?)),
+ VarDisplayRecord::SUBTYPE => Ok(Record::VarDisplay(VarDisplayRecord::parse(
+ &extension,
+ endian,
+ |_| (),
+ )?)),
+ MultipleResponseRecord::SUBTYPE | 19 => Ok(Record::MultipleResponse(
+ MultipleResponseRecord::parse(&extension, endian, |_| ())?,
+ )),
+ LongStringValueLabelRecord::SUBTYPE => Ok(Record::LongStringValueLabels(
+ LongStringValueLabelRecord::parse(&extension, endian, |_| ())?,
+ )),
+ EncodingRecord::SUBTYPE => Ok(Record::Encoding(EncodingRecord::parse(
+ &extension,
+ endian,
+ |_| (),
+ )?)),
+ NumberOfCasesRecord::SUBTYPE => Ok(Record::NumberOfCases(NumberOfCasesRecord::parse(
+ &extension,
+ endian,
+ |_| (),
+ )?)),
+ 5 => Ok(Record::VariableSets(extension.into())),
+ 10 => Ok(Record::ProductInfo(extension.into())),
+ 13 => Ok(Record::LongNames(extension.into())),
+ 14 => Ok(Record::LongStrings(extension.into())),
+ 17 => Ok(Record::FileAttributes(extension.into())),
+ 18 => Ok(Record::VariableAttributes(extension.into())),
+ _ => Ok(Record::OtherExtension(extension)),
+ }
}
}
+#[derive(Clone, Debug)]
pub struct ZHeader {
/// File offset to the start of the record.
pub offset: u64,
}
}
+#[derive(Clone, Debug)]
pub struct ZTrailer {
/// File offset to the start of the record.
pub offset: u64,
pub blocks: Vec<ZBlock>,
}
+#[derive(Clone, Debug)]
pub struct ZBlock {
/// Offset of block of data if simple compression were used.
pub uncompressed_ofs: u64,
Ok(vec)
}
-fn read_string<R: Read>(r: &mut R, endian: Endian) -> Result<Vec<u8>, IoError> {
+fn read_string<R: Read>(r: &mut R, endian: Endian) -> Result<UnencodedString, IoError> {
let length: u32 = endian.parse(read_bytes(r)?);
- read_vec(r, length as usize)
+ Ok(read_vec(r, length as usize)?.into())
+}
+
+#[derive(Clone, Debug)]
+pub struct LongStringValueLabels {
+ pub var_name: UnencodedString,
+ pub width: u32,
+
+ /// `(value, label)` pairs, where each value is `width` bytes.
+ pub labels: Vec<(UnencodedString, UnencodedString)>,
+}
+
+#[derive(Clone, Debug)]
+pub struct LongStringValueLabelRecord(Vec<LongStringValueLabels>);
+
+impl ExtensionRecord for LongStringValueLabelRecord {
+ const SUBTYPE: u32 = 21;
+ const SIZE: Option<u32> = Some(1);
+ const COUNT: Option<u32> = None;
+ const NAME: &'static str = "long string value labels record";
+
+ fn parse(ext: &Extension, endian: Endian, _warn: impl Fn(Error)) -> Result<Self, Error> {
+ ext.check_size::<Self>()?;
+
+ let mut input = &ext.data[..];
+ let mut label_set = Vec::new();
+ while !input.is_empty() {
+ let var_name = read_string(&mut input, endian)?;
+ let width: u32 = endian.parse(read_bytes(&mut input)?);
+ let n_labels: u32 = endian.parse(read_bytes(&mut input)?);
+ let mut labels = Vec::new();
+ for _ in 0..n_labels {
+ let value = read_string(&mut input, endian)?;
+ let label = read_string(&mut input, endian)?;
+ labels.push((value, label));
+ }
+ label_set.push(LongStringValueLabels {
+ var_name,
+ width,
+ labels,
+ })
+ }
+ Ok(LongStringValueLabelRecord(label_set))
+ }
}
projects / pspp / blobdiff